STATS:DATA+MODELS-W/DVD
4th Edition
ISBN: 9780321986498
Author: DeVeaux
Publisher: PEARSON
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Chapter 11, Problem 43E
To determine
Explain whether it is reasonable to estimate the proportion of fish with discolored scales in the river.
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The overall distance traveled by a golf ball is tested by hitting the ball with Iron Byron, a
mechanical golfer with a swing that is said to emulate the distance hit by the legendary champion
Byron Nelson. Ten randomly selected balls of two different brands are tested and the overall
distance measured.
Brand 1: 275, 286, 287, 271, 283, 271, 279, 275, 263, 267
Brand 2: 258, 244, 260, 265, 273, 281, 271, 270, 263, 268
a) Is there evidence to support the claim that the standard deviation of overall distance is the
same for both brands of balls (use α = 0.05)?
b) Is there evidence to support the claim that the mean of the overall distance is the same for
both brands of balls (use α = 0.05)?
Use technology to find (a) the multiple regression equation for the data shown in the accompanying table, (b) the standard error estimate and interpret the result, and (c) the coefficient of
determination and interpret the result.
The accompanying table shows the total square footages (in billions) of retailing space at shopping centers, the numbers (in thousands) of shopping centers, and the sales (in billions of dollars) for
shopping centers for eight years.
Click the icon to view the data table on shopping center sales.
(a) What is the regression equation?
ŷ = 1 + ( )×₁ + (1)×2
(Round to two decimal places as needed.)
(b) The standard error is ☐
(Round to two decimal places as needed.)
Interpret the standard error. Choose the correct answer below.
Shopping center sales
Sales, y
Total square footage, X₁
Shopping centers, X2
123.4 211.5 385.6 475.5 641.3 716.5 768.2 806.8 851.7 893.9 933.7
1.3 2.8 3.3 3.7 4.1 4.6 4.7 4.8 4.9 5.0 5.1
13.6 17.3 22.2 25.5 32.8 38.0 39.1 39.2 40.5 41.2…
Not use ai please
Chapter 11 Solutions
STATS:DATA+MODELS-W/DVD
Ch. 11.2 - 1. Various claims are often made for surveys. Why...Ch. 11.4 - 2. We need to survey a random sample of the 300...Ch. 11 - Prob. 1ECh. 11 - 2. Satisfied workers The managers of a large...Ch. 11 - Prob. 3ECh. 11 - Prob. 4ECh. 11 - Prob. 5ECh. 11 - 6. Sampling satisfaction A company hoping to...Ch. 11 - Prob. 7ECh. 11 - 8. Satisfactory satisfaction samples For each...
Ch. 11 - Prob. 9ECh. 11 - 10. Happy employees The company plans to have the...Ch. 11 - Prob. 11ECh. 11 - 12. Surveying employees The company of Exercise 2...Ch. 11 - Prob. 13ECh. 11 - 14. Student center survey For their class project,...Ch. 11 - Prob. 15ECh. 11 - Prob. 16ECh. 11 - Prob. 17ECh. 11 - Prob. 18ECh. 11 - Prob. 19ECh. 11 - Prob. 20ECh. 11 - Prob. 21ECh. 11 - In Exercises 17 to 23, for the reports about...Ch. 11 - Prob. 23ECh. 11 - 24. Mistaken poll A local TV station conducted a...Ch. 11 - Prob. 25ECh. 11 - 26. Parent opinion, part 1 In a large city school...Ch. 11 - Prob. 27ECh. 11 - 28. Churches For your political science class,...Ch. 11 - 29. Playground Some people have been complaining...Ch. 11 - 30. Roller coasters An amusement park has opened a...Ch. 11 - 31. Playground, act two The survey described in...Ch. 11 - 32. Wording the survey Two members of the PTA...Ch. 11 - 33. Banning ephedra An online poll on a website...Ch. 11 - 34. Survey questions Examine each of the following...Ch. 11 - Prob. 35ECh. 11 - 36. Phone surveys Any time we conduct a survey, we...Ch. 11 - 37. Cell phone survey What about drawing a random...Ch. 11 - 39. Fuel economy Occasionally, when I fill my car...Ch. 11 - 40. Accounting Between quarterly audits, a company...Ch. 11 - 41. Happy workers? A manufacturing company employs...Ch. 11 - 42. Quality control Sammy’s Salsa, a small local...Ch. 11 - 43. A fish story Concerned about reports of...Ch. 11 - 45. Sampling methods Consider each of these...Ch. 11 - 46. More sampling methods Consider each of these...
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